diff --git a/llvm/lib/DebugInfo/GSYM/LookupResult.cpp b/llvm/lib/DebugInfo/GSYM/LookupResult.cpp
--- a/llvm/lib/DebugInfo/GSYM/LookupResult.cpp
+++ b/llvm/lib/DebugInfo/GSYM/LookupResult.cpp
@@ -43,7 +43,7 @@
     OS << " @ ";
     if (!SL.Dir.empty()) {
       OS << SL.Dir;
-      if (SL.Dir.contains('\\') and not SL.Dir.contains('/'))
+      if (SL.Dir.contains('\\') && !SL.Dir.contains('/'))
         OS << '\\';
       else
         OS << '/';